Digital Rebar Local File Inclusion Scanner

Digital Rebar is used extensively in the IT and DevOps industry to automate the provisioning and configuration of infrastructure. This software is typically deployed within enterprise environments to manage a large number of systems efficiently. The purpose of Digital Rebar is to simplify the orchestration and management of systems, thereby reducing the complexity and overhead associated with manual processes. It's utilized by IT administrators to ensure consistent and repeatable deployment processes across different environments. This product supports rapid deployment, configuration, and scaling of resources, making it an invaluable tool for organizations of all sizes. Moreover, Digital Rebar integrates with various infrastructure components to provide a seamless management experience.

Local File Inclusion (LFI) is a vulnerability that allows an attacker to include files, typically on the web server, via the web browser. This vulnerability is due to insufficient input validation in web applications, which can be manipulated to access files outside the intended directory structure. An attacker can exploit this vulnerability to access sensitive files, such as configuration files containing credentials or other sensitive information. This can result in information leakage and potential footholds for further exploitation. LFI can be especially dangerous if it leads to the inclusion of files containing executable code, potentially resulting in code execution on the server. Proper awareness and remediation are critical to defending against such vulnerabilities.

The Digital Rebar implementation is susceptible to Local File Inclusion, allowing unauthorized users to include and display files on the server. The vulnerable endpoint involves the handling of file paths, where attackers can manipulate the input to traverse directories and access files outside the allowed range. Parameters intended for file directory navigation lack sufficient validation checks, thus allowing paths such as "../../../../etc/passwd" to be processed by the application. This security oversight permits an attacker to retrieve system files and potentially sensitive application data even if those files reside outside the application's typical directory structure. The severity is compounded by the possibility of leveraging LFI locations to gain further access or execute code indirectly within the application context.

If exploited, this vulnerability could lead to unauthorized access to files containing sensitive information, such as password hashes, configuration details, and other critical data stored on the server. This information can aid an attacker in mounting further attacks against the organization, such as privilege escalation, data exfiltration, or complete server compromise. The presence of this vulnerability can become a stepping stone for additional exploitation methods, potentially affecting the confidentiality, integrity, and availability of the system and its data. The exploitability of this vulnerability is high, given that services exposed to the internet are frequently targeted for such low-complexity attacks.

REFERENCES

• https://docs.rackn.io/en/latest/doc/security/cve_20200924A.html
• https://docs.rackn.io/en/latest/doc/release.html